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Barium titanate ceramic dielectric material

A technology of ceramic dielectric and barium titanate, which is applied in the direction of fixed capacitor dielectric, fixed capacitor parts, etc., to achieve uniform growth, low sintering temperature of ceramic body, and simple process

Inactive Publication Date: 2009-01-21
GUANGDONG FENGHUA ADVANCED TECH HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved in the present invention is to provide an ultra-low temperature sintered barium titanate ceramic dielectric material that conforms to the characteristics of X7R ceramics, is environmentally friendly, has high material dispersibility, and has a good molding process, and when using this material to make MLCC products, the sintering temperature is low. , The particle size distribution of the barium titanate ceramic dielectric material is uniform, the grain growth is uniform, dense, and the product has no or few defects

Method used

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  • Barium titanate ceramic dielectric material

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Embodiment

[0010] A barium titanate ceramic dielectric material. The barium titanate ceramic dielectric material is prepared by using the formulas of No. 1 to No. 10 materials in Table 1 by a conventional process. When these barium titanate ceramic dielectric materials are made into MLCC products by conventional technology, the sintering temperature is 1000°C±50°C. The obtained MLCC products have the characteristics of stable capacity and good performance. The performance test parameters of the MLCC products are as the MLCC test parameters corresponding to No. 1-10 material formulations in Table 2.

[0011] Table 1: Formulation composition of main crystal phase, modifying additives, and glass flux

[0012]

[0013] Table 2: Performance parameters of MLCC products made from ceramic dielectric materials according to No. 1-10 formulations

[0014]

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Abstract

The invention discloses a barium titanate ceramic dielectric material, consisting of a main crystal phase, a modified additive and a glass flux. In percentage by mol, the main crystal phase BaTiO3 accounts for 80 to 95 percent; the modified additive accounts for 0.7 to 19.5 percent; and the glass flux accounts for 1.21 to 9.1 percent. The invention has the advantages that the barium titanate ceramic dielectric material accords with X7R ceramic dielectric characteristics, and is good in environmental protection property, high in material dispersity and good in molding process; when the material is used for manufacturing MLCC products, and sintering temperature is low; and the barium titanate ceramic dielectric material is uniform in particle size distribution, uniform and compact in grain growth and free from or few in product detects.

Description

technical field [0001] The invention relates to a barium titanate ceramic dielectric material, in particular to a barium titanate ceramic dielectric material which can be matched with a silver-rich electrode and used for MLCC manufacture. Background technique [0002] In the field of material application, electronic ceramic materials have been widely used in multilayer chip ceramic capacitors (MLCC), resistors, inductors, microwaves, integrated circuit substrates, optoelectronic devices, LC, RC, L-C-R composite components, sensors, etc. in electronic components. MLCC has become one of the components that can best adapt to the rapid development of electronic technology by virtue of its unique advantages such as large specific volume, chip type, and high reliability. The progress of MLCC production technology always depends on the development of material system and corresponding process technology. At present, although some domestic manufacturers have very mature X7R environ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/468C04B35/622
CPCH01G4/08
Inventor 李娟宋永生张火光魏汉光任海东
Owner GUANGDONG FENGHUA ADVANCED TECH HLDG
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